HTC One M8. Was happy to stick with it but it started to get laggy and drove me nuts. I had a G3 last year that I returned due to the poor headphone sound (I use my phone for music as much as for anything else). Listened to the G4 and V10, and the V10 convinced me to come over from HTC after 4 years--headset sound is really impressive. Love the headphone sound, love the camera (even in lower-light), the manual settings for video are sweet, and they've gotten rid of the lag from earlier models even with the Snapdragon 808 processor instead of the 810. Never thought I'd go for a phone this big but it feels fine in the hand and the screen is beautiful. Definitely enjoying Binge On on the bigger screen.
I regularly shoot video in a lower-light indoor arena of sports, and the manual video settings make a remarkable difference in video quality. No regrets here at all.